Surface polish + internal hygiene pass — see CHANGELOG for details.

Also tightens parseReportArgs in src/cli/team.ts for
noUncheckedIndexedAccess: the for-index loop indexes args[i] which is
typed as string | undefined in strict mode, so the loop body adds a
single defensive continue, and the final positionals[0] reads through
a ?? null fallback (logic-equivalent — length is gated above). The
parser rewrite in 6ad9c65 introduced these strict-mode gaps; they were
not caught locally because pnpm check is biome-only and pnpm test runs
via esbuild without tsc. pnpm build now compiles cleanly.

Verified: pnpm release:dry passes (check + build + test + pack:check +
pack:smoke).